
Contents
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6.1 Data-Acquisition Hardware 6.1 Data-Acquisition Hardware
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6.2 Interactive Utility Programs: MAX and DAQami 6.2 Interactive Utility Programs: MAX and DAQami
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6.3 Analog Input Modes 6.3 Analog Input Modes
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6.4 Range and Resolution 6.4 Range and Resolution
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6.5 Sampling Frequency and Aliasing Effect 6.5 Sampling Frequency and Aliasing Effect
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6.6 Analog Input Operation Using MAX and DAQami 6.6 Analog Input Operation Using MAX and DAQami
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6.7 Analog Output 6.7 Analog Output
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6.8 Analog Output Operation Using MAX and DAQami 6.8 Analog Output Operation Using MAX and DAQami
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6.9 Digital Input/Output 6.9 Digital Input/Output
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6.10 Digital Input/Output Operation Using MAX and DAQami 6.10 Digital Input/Output Operation Using MAX and DAQami
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Do It Yourself Do It Yourself
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Use It! Use It!
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Problems Problems
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6 Introduction to Data-Acquisition Device Features
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Published:November 2024
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Abstract
This chapter assumes that readers have access to a multifunction data-acquisition (DAQ) device from either NI (formerly, National Instruments) or Measurement Computing Corporation (MCC). Both NI and MCC are manufacturers of popular, high-quality DAQ devices, where MCC devices are the lower priced option with (satisfactorily) scaled-down specifications. Using the interactive program appropriate for their device (MAX for NI, DAQami for MCC), readers familiarize themselves with the capabilities of a multifunction DAQ device, including analog-to-digital conversion, digital-to-analog conversion, digital input/output operations, and digital pulse counting. In the course of this work, explanations are given of the following important digitized data concepts: analog input modes, range, resolution, sampling frequency, aliasing, digital input/output levels, and digital triggering. The NI USB-6002 and MCC USB-202 DAQ devices are highlighted, but the programs developed apply to most other NI and MCC multifunction DAQ multifunction devices. In a Do It Yourself project, readers create a millisecond-resolution stopwatch and a Use It! example investigates how to synchronize the repeated digital acquisition of a periodic waveform via digital triggering.
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